A project to move packed earth requires you to decide whether to use a dozer/scraper operation or excavator/truck operation. Determine the most economical operation based on the dozer/scraper operation estimated at $1.25/cy. All equipment carries a rated heaped capacity, has a fill factor of 100%, and works 45-min hours. Excavator costs $95/hr （including operator), cycle time is 0.28 min, and bucket heaped capacity is 5.0 cy. Truck costs $150/hr.(including operator), dump time is 0.5 min （maneuver, dump, turn), heaped capacity is 31.7 cy, and 12 trucks are available for the project.Hauling equipment operates in one direction from A to B to C and finally to D. Section      Load         Length (ft)       Speed (mph) A                full              3000                    9 B                full              2500                   17 C             empty           3000                   36 D             empty          3000                   16

A project to move packed earth requires you to decide whether to use
a dozer/scraper operation or excavator/truck operation. Determine
the most economical operation based on the dozer/scraper operation
estimated at $1.25/cy. All equipment carries a rated heaped capacity, has
a fill factor of 100%, and works 45-min hours. Excavator costs $95/hr
（including operator), cycle time is 0.28 min, and bucket heaped capacity
is 5.0 cy. Truck costs $150/hr.(including operator), dump time is 0.5 min
（maneuver, dump, turn), heaped capacity is 31.7 cy, and 12 trucks are
available for the project.Hauling equipment operates in one direction
from A to B to C and finally to D.

Section      Load         Length (ft)       Speed (mph)
A                full              3000                    9
B                full              2500                   17
C             empty           3000                   36
D             empty          3000                   16